A brief information about three substances is given :X: Transparent, smooth to touch and insulator.Y: Yellow in colour, good conductor of heat and electricity, lustrous.Z: Man made material, an insulator, used to make switches and handles of cooking utensils.X, Y and Z could be respectively

• A. Water, copper, aluminium
• B. Glass, gold, plastic
• C. Paper, aluminium, copper
• D. Silver, gold, copper.